The whole idea of the executive branch functioning as the judicial branch is a bananas concept to me.
Instead of the same old talking point, what solution do you propose? Should the executive branch agency make decisions by fiat, without due process? The use of due process doesn't make them a judiciary; it's just a more fair way to make decisions within their purview. Should we move every such judgment out of the executive branch's hands? First, they have to be able to make some decisions. But the heart of this issue…
Then appoint more Article 3 judges. It could even be the same people who are now "administrative judges"—but take them out of the executive branch hierarchy, and give them the independence that the constitution requires judges to have.